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Important notes on use
To function properly, BlueTEC exhaust gas aftertreatment must be operated with the reducing agent DEF. Adding DEF is one of the tasks performed during maintenance. Under normal operating condi ...

General notes
WARNING All categories of messages contain important information which should be taken note of and, where a malfunction is indicated, addressed as soon as possible at an authorized Mercedes- ...

Engine
Problem Possible causes/consequences and •► Solutions The yellow Check Engine warning lamp lights up while the engine is running. There may be a malfunction, for example: ...